Unidirectional Yagi-Uda antenna design for 4G LTE coverage enhancement

Hairol Ashar, ‘Ain Sabrina (2024) Unidirectional Yagi-Uda antenna design for 4G LTE coverage enhancement. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This project aims to develop a 4G antenna for enhancing 4G LTE coverage in a specific area. The chosen antenna is a rectangular-disk Yagi antenna, and the analysis of its radiation pattern and return-loss gain revealed that the maximum gain is achieved at the antenna's operating frequency in Band 7 of the 4G LTE spectrum. To enhance performance, an array technique was employed, involving a reduction in the width of the antenna elements. Initially, simulated results for return loss and gain were not obtained at the desired frequency of 2.6GHz but were achieved at 2.3GHz, showing values of -13.44dB and 4.28dBi, respectively. However, through the optimization of element width, the antenna successfully responded at 2.6GHz, resulting in a significant improvement from -13.44dB to -15.02dB for return loss, from 4.28dBi to 11.74dBi for gain and 94.51% efficiency. Additional 4G LTE band was acquired at 2.3GHz in Band 40 with return loss of -30.14dB, 12.07dBi gain and 99.31% efficiency. Subsequently, a model was fabricated and tested to validate the antenna design, and the measured results aligned well with the simulated ones. In conclusion, the project effectively enhances internet connection quality when the antenna is present, marking its completion and successful achievement of objectives.

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